Worst 4 cards to face?

What's the worst draw you've seen your opponent have in elo? (By worst, I mean hardest to beat, opponent has very strong hand)
I went up against an opponent who drew 4 Ulu Watu powerhouses: Buck, Nanook, Hikiyousan, Shayna. I felt like there was nothing I could do. Had I pilled just right, I probably could have won, but minor mistake, and it was 2HKO.